scholarly journals Global MHD modeling of the impact of a solar wind pressure change

2002 ◽  
Vol 107 (A7) ◽  
Author(s):  
Kristi A. Keller
Keyword(s):  
Solar Wind ◽  
Pressure Change ◽  
Wind Pressure ◽  
Solar Wind Pressure ◽  
Mhd Modeling ◽  
The Impact

The asymmetric geospace response to rapid changes in solar wind pressure

2021 ◽  
Author(s):  
Michael Madelaire ◽  
Karl Laundal ◽  
Jone Reistad ◽  
Spencer Hatch ◽  
Anders Ohma ◽  
...  
Keyword(s):  
Solar Wind ◽  
Dynamic Pressure ◽  
Interplanetary Shock ◽  
Wind Pressure ◽  
Field Orientation ◽  
Superposed Epoch Analysis ◽  
Rapid Changes ◽  
Solar Wind Structure ◽  
Solar Wind Pressure ◽  
The Impact

<p>The geospace response to rapid changes in solar wind pressure results in a perturbation of the magnetospheric-ionospheric system. Ground magnetometer stations located at polar latitudes have long been known to measure a sudden impulse only minutes after a solar wind structure reaches the magnetopause.<br>Here a list of events associated with a step-like feature in the solar wind dynamic pressure between 1994 and 2020 is compiled based on in situ observations from ACE and Wind. Arrival time estimates are calculated using a simple propagation method and validated with a correlation analysis using SYM-H from low/mid latitude stations. A superposed epoch analysis is carried out to investigate the impact of season, interplanetary magnetic field orientation and other attributes pertaining to the interplanetary shock. All available ground magnetometer stations in SuperMAG, during each event, are used allowing for global coverage. <br>Global data coverage is important for this kind of comparative analysis as it is needed to determine changes in the systems response due to e.g. season, which might lead to an improved understanding of the magnetospheric-ionospheric-thermospheric coupling.</p>

scholarly journals Solar wind and substorm excitation of the wavy current sheet

2009 ◽  
Vol 27 (6) ◽  
pp. 2457-2474 ◽  
Author(s):  
C. Forsyth ◽  
M. Lester ◽  
R. C. Fear ◽  
E. Lucek ◽  
I. Dandouras ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Solar Wind ◽  
Current Sheet ◽  
Pressure Pulse ◽  
Wind Pressure ◽  
Expansion Velocity ◽  
Solar Wind Pressure ◽  
Wave Models ◽  
Best Fit ◽  
The Magnetic Field

Abstract. Following a solar wind pressure pulse on 3 August 2001, GOES 8, GOES 10, Cluster and Polar observed dipolarizations of the magnetic field, accompanied by an eastward expansion of the aurora observed by IMAGE, indicating the occurrence of two substorms. Prior to the first substorm, the motion of the plasma sheet with respect to Cluster was in the ZGSM direction. Observations following the substorms show the occurrence of current sheet waves moving predominantly in the −YGSM direction. Following the second substorm, the current sheet waves caused multiple current sheet crossings of the Cluster spacecraft, previously studied by Zhang et al. (2002). We further this study to show that the velocity of the current sheet waves was similar to the expansion velocity of the substorm aurora and the expansion of the dipolarization regions in the magnetotail. Furthermore, we compare these results with the current sheet wave models of Golovchanskaya and Maltsev (2005) and Erkaev et al. (2008). We find that the Erkaev et al. (2008) model gives the best fit to the observations.

scholarly journals Induced and Permanent Magnetism on the Moon: Structural and Evolutionary Implications

1971 ◽  
Vol 2 ◽  
pp. 173-188
Author(s):  
C. P. Sonett ◽  
P. Dyal ◽  
D. S. Colburn ◽  
B. F. Smith ◽  
G. Schubert ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Solar Wind ◽  
Dynamic Pressure ◽  
Wind Pressure ◽  
Dark Side ◽  
The Moon ◽  
Permanent Magnetic Field ◽  
Crustal Layer ◽  
Induced Field ◽  
Solar Wind Pressure

AbstractIt is shown that the Moon possesses an extraordinary response to induction from the solar wind due to a combination of a high interior electrical conductivity together with a relatively resistive crustal layer into which the solar wind dynamic pressure forces back the induced field. The dark side response, devoid of solar wind pressure, is approximately that expected for the vacuum case. These data permit an assessment of the interior conductivity and an estimate of the thermal gradient in the crustal region. The discovery of a large permanent magnetic field at the Apollo 12 site corresponds approximately to the paleomagnetic residues discovered in both Apollo 11 and 12 rock samples The implications regarding an early lunar magnetic field are discussed and it is shown that among the various conjectures regarding the early field the most prominent are either an interior dynamo or an early approach to the Earth though no extant model is free of difficulties.

The role of solar wind pressure jumps in the initiation and control processes of magnetospheric substorms

2011 ◽  
Vol 51 (7) ◽  
pp. 979-993 ◽  
Author(s):  
V. A. Parkhomov ◽  
N. L. Borodkova ◽  
A. V. Dmitriev ◽  
P. M. Klimov ◽  
R. A. Rakhmatulin
Keyword(s):  
Solar Wind ◽  
Wind Pressure ◽  
Magnetospheric Substorms ◽  
Control Processes ◽  
Solar Wind Pressure ◽  
And Control

scholarly journals Dayside magnetospheric and ionospheric responses to solar wind pressure increase: Multispacecraft and ground observations

2016 ◽  
Vol 121 (11) ◽  
pp. 10,813-10,830 ◽  
Author(s):  
A. M. Tian ◽  
X. C. Shen ◽  
Q. Q. Shi ◽  
B. B. Tang ◽  
M. Nowada ◽  
...  
Keyword(s):  
Solar Wind ◽  
Wind Pressure ◽  
Pressure Increase ◽  
Solar Wind Pressure

scholarly journals Ionospheric signatures of plasma injections in the cusp triggered by solar wind pressure pulses

2005 ◽  
Vol 110 (A8) ◽  
Author(s):  
Jean-Claude Cerisier ◽  
Aurélie Marchaudon ◽  
Jean-Michel Bosqued ◽  
Kathryn McWilliams ◽  
Harald U. Frey ◽  
...  
Keyword(s):  
Solar Wind ◽  
Wind Pressure ◽  
Pressure Pulses ◽  
Solar Wind Pressure
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